Can't sign in to AppStore sandbox account

In Settings -> App Store -> Sandbox account -> Enter

Filling all fileds, entering code and 2F autentication. But then nothing happened.

Video example https://disk.yandex.ru/i/B9rWFtsjZ4XRRA

Can you confirm your Apple ID was created in App Store Connect under the Sandbox Testers tab?

it's been happening to us for months... to the point that we just let it be

Can't sign in to AppStore sandbox account
 
 
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